CN219535738U

CN219535738U - Outer rotor fan

Info

Publication number: CN219535738U
Application number: CN202320640151.8U
Authority: CN
Inventors: 孔万敏; 陈洪星; 朱香华; 吴凌颖; 李�杰
Original assignee: Zhejiang Mingzhen Electronics Co ltd
Current assignee: Zhejiang Mingzhen Electronics Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-08-15
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses an outer rotor fan which comprises a driver, a stator, an outer rotor, a flange and an impeller, wherein the outer rotor is arranged outside the stator and matched with the stator, the stator is connected with the driver, reinforcing ribs are arranged on the end face of the outer rotor, the flange is fixedly arranged on the periphery of the outer rotor, the flange is arranged on the outer rotor far away from one end of the reinforcing ribs, the impeller is fixedly arranged on the flange, and the impeller is annular and distributed along the circumferential direction of the outer rotor. According to the utility model, the reinforcing ribs are additionally arranged on the outer rotor, so that the surface area of the outer rotor is increased, a certain heat dissipation effect is achieved, the service life of the fan is prolonged, and the overall height of the fan can be reduced.

Description

Outer rotor fan

Technical Field

The utility model relates to an outer rotor fan.

Background

When the existing high-power external rotor fan runs at high speed, because the structure is single-pivot support, one end of a motor rotating shaft is fixed at the top end of a rotor, and the other end of the motor rotating shaft is suspended, the supporting end face of the top end of the rotor is easy to deform, so that the fan is unstable in running, vibration and running noise are generated, and the service life of the fan can be influenced.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an outer rotor fan, so that fan noise is reduced, and fan operation stability is improved.

In order to achieve the above purpose, the technical scheme adopted by the utility model is that the outer rotor fan comprises a driver, a stator, an outer rotor, a flange and an impeller, wherein the outer rotor is arranged outside the stator and matched with the stator, the stator is connected with the driver, the end face of the outer rotor is provided with reinforcing ribs, the flange is fixedly arranged on the periphery of the outer rotor, the flange is arranged on the outer rotor far away from one end of the reinforcing ribs, the impeller is fixedly arranged on the flange, and the impeller is annular and distributed along the circumferential direction of the outer rotor.

In an embodiment of the present utility model, the flange is provided with a positioning hole for installing a fastener for fixing the impeller.

In one embodiment of the utility model, the mounting position of the flange is 1/5-1/3 of the length of the outer rotor.

In an embodiment of the present utility model, the reinforcing rib is composed of a plurality of ribs, and the ribs are distributed in a divergent manner on an end surface of the reinforcing rib. The end face of the motor outer rotor is stamped with the reinforcing ribs, the reinforcing ribs are stamped and formed, the rigidity of the outer rotor can be increased without increasing the wall thickness of the outer rotor, and the working stability of the high-power outer rotor large fan is ensured.

In an embodiment of the present utility model, an end surface of the outer rotor where the reinforcing ribs are located is provided with an inclined surface, the inclined surface is connected to an outer circumferential surface of the outer rotor in an extending manner, and the reinforcing ribs are continuously distributed on the inclined surface.

In an embodiment of the utility model, a fixed shaft mounting opening is formed in the middle of the end face of the outer rotor, where the reinforcing ribs are arranged, and the reinforcing ribs extend from the inclined plane to the fixed shaft mounting opening.

In an embodiment of the utility model, the motor further comprises a baffle disc, the baffle disc is fixedly connected with the driver, the baffle disc is in a cap shape, and the stator part is covered in the baffle disc.

The technical scheme has the following beneficial effects:

according to the utility model, the reinforcing ribs are additionally arranged on the outer rotor, so that the surface area of the outer rotor is increased, a certain heat dissipation effect is achieved, and the service life of the fan is prolonged. Due to the arrangement of the reinforcing ribs, the strength of the outer rotor is improved, the flange position can be installed closer to the rear end of the outer rotor, and then the whole height of the fan is lowered than that of the fan before, so that the fan is wider in applicability.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is an exploded view of one embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an embodiment of the present utility model;

fig. 4 is a schematic perspective view of an outer rotor according to an embodiment of the present utility model.

Reference numerals illustrate: the device comprises a driver 1, a stator 2, an outer rotor 3, a flange 4, an impeller 5, a baffle plate 6, ribs 7, a positioning convex hole 8, a fixed shaft mounting port 9 and an inclined plane 10.

Detailed Description

The utility model is further described below with reference to the examples and figures 1 to 4.

The utility model provides an external rotor fan, includes driver 1, stator 2, external rotor 3, flange 4 and impeller 5, the external rotor install the outside at the stator, with cooperate between the stator 2, the stator with driver 1 is connected, the terminal surface of external rotor 3 is equipped with the strengthening rib, flange fixed mounting is in external rotor 3 periphery, flange 4 is installed on keeping away from on the external rotor of strengthening rib one end, the mounted position of flange 4 is located 1/5-1/3 department of external rotor 3 axial length. The flange 4 is provided with a positioning convex hole 8 for installing a fastener for fixing the impeller. The impeller is fixedly arranged on the flange, is annular and is distributed along the circumferential direction of the outer rotor.

The reinforcing rib is composed of a plurality of ribs 7, and the ribs 7 are distributed in a divergent mode on the end face of the reinforcing rib. The ribs 7 are formed by stamping, so that the rigidity of the outer rotor can be increased without increasing the wall thickness of the outer rotor, and the working stability of the high-power outer rotor large fan is ensured. An inclined plane 10 is arranged on the end face of the outer rotor where the reinforcing ribs are located, and a fixed shaft mounting opening 9 is arranged in the middle of the end face of the end, where the reinforcing ribs are arranged, of the outer rotor, and is used for mounting a driver fixed shaft. The inclined plane is connected with the outer circumferential surface of the outer rotor in an extending mode, the reinforcing ribs are distributed on the inclined plane 10 continuously, and the reinforcing ribs extend from the inclined plane to the position of the fixing shaft mounting opening 9.

The stator part is covered in the baffle disc.

During assembly, the impeller is firstly arranged and fixed on the rotor mounting flange, and the position of the mounting flange can be adjusted on the rotor according to different height requirements of the fan; then the stator is arranged in the rotor; and finally, installing a driver, and assembling the permanent magnet synchronous outer rotor fan with the driving function.

According to the utility model, through the design of end face reinforcing ribs, the integral strength of the outer rotor of the fan is enhanced, and the position of the impeller of the fan can be mounted more towards the rear end than before, so that the height of the integral fan is reduced, and the integral operation life of the fan is effectively prolonged. The reinforcing ribs are arranged, so that the heat dissipation area of the motor is increased, and a certain auxiliary heat dissipation effect can be achieved; in addition, the strength of the rotor is enhanced by a reinforcing bar method, so that the thickness of the outer rotor steel can be properly reduced, and the materials are saved.

The above-described embodiments are only for illustrating the present utility model, not for limiting the present utility model, and any changes and substitutions without inventive effort, which are within the scope of the inventive concept and the claims, fall within the scope of the patent claims.

Claims

1. The utility model provides an external rotor fan, its characterized in that includes driver, stator, external rotor, flange and impeller, the external rotor install the outside of stator, with cooperate between the stator, the stator with the driver is connected, the terminal surface of external rotor is equipped with the strengthening rib, flange fixed mounting is in the external rotor periphery, the flange is installed on the external rotor of keeping away from strengthening rib one end, impeller fixed mounting is on the flange, the impeller is annular, along the circumference distribution of external rotor.

2. The external rotor fan as claimed in claim 1, wherein the flange is provided with a positioning boss hole for installing a fastener for fixing the impeller.

3. The external rotor fan according to claim 2, wherein the mounting position of the flange is located at 1/5-1/3 of the length of the external rotor.

4. The outer rotor fan according to claim 1, wherein the reinforcing ribs are composed of a plurality of ribs, and the ribs are distributed in a divergent shape on the end face of the reinforcing ribs.

5. The outer rotor fan according to claim 4, wherein the end face of the outer rotor where the reinforcing ribs are located is provided with inclined surfaces, the inclined surfaces are connected to the outer circumferential surface of the outer rotor in an extending mode, and the reinforcing ribs are continuously distributed on the inclined surfaces.

6. The outer rotor fan according to claim 5, wherein a fixed shaft mounting opening is formed in the middle of the end face of the end, provided with the reinforcing ribs, of the outer rotor, and the reinforcing ribs extend from the inclined surface to the fixed shaft mounting opening.

7. The external rotor fan as claimed in any one of claims 1 to 6, further comprising a baffle disc fixedly connected to the driver, the baffle disc having a hat shape, the stator portion being housed within the baffle disc.